Grinding apparatus



0d. 3o, 192s. 1,689,922

D.` T. HOY

vGRINDING APPARATUS Filed Dec. 28, 1927 2 Sheets-Sheet 1 Oct. 30, 1928.

D. T. HOY

GRINDING APPARATUS `Filed Dec. 28, 1927 2 SheXetS-'Sheet 2 72.06%?? DEAR Tun/a Ho Y Patented Oct. 30; 1928.

Dm TUNG- new, lor carcasa; :arrivors.V

GBIKNDING Arrami's.

Applicaftionjled December 28,1327. 'Serial No. 213,15).

chir-1c, and. it hasniore particular reference a grinder that` fis actuated hydraulically through the medium "of the usual normal 5 pressure maintained in cit-y service pipes.

` @Primarllyi 'my lwentfmn has foi-lts-010160# and which 'iS S0 SSIlbled that thereJ is little 1a .or nothing to genoot, oifordefr; In connection with theact'uation of fthe grinder element or stone, `1 have `provi ed a novel arrangement ict-assembling "the Sa'ine so that yit may be readily` replacedby `piersons unskilled in the 20 iiseof tools;and I haifjekalso provided a counter-balanced lgolw'f'eqifthat may be thi-[own into action Whenever the stone is to loe. giron fhca'vy Service, as forekjample, 'when grinding large tools. The 'dispositiono the Water disis charge clef-nent 'is "suoh that the surging s'breih `will Splash against the Stone` 1n Order Vto maintain the saine in Ino'ist condition While in use and prevent heating. My apparatus is very `coripact :audit may he readily 'carried "3b by carpenters', plum eijs, Tand othernfechanin choir moi-@hosts or kas waeren is; iaivWaysriiblyL for use. Other objectsiotrny 1nven'tlicn siide -in providing@ g'mdmg arparams that :is novel and Simple 1n constric- 36 han, dependable ZrL Operation, may 'be 'eadlljy take-i1 .apart fQf-ifplaccmcnb OrLfcPail'ianCllS economical 'tb manufacture so that it may ibi@ offered the retail trade ata moderate price.

I prefer to carry but my inye'ntionand to 40 accomplish thefnuinerousfobjects thereof. in

substantially the lmjann'er hereinafter fully described as more particularly pointed out inl the claijrns`, reterenf herein made to the accompanying 'drawings that are a part 45 ofjff-hisspecificotion.,

lathe dmwihg 1- Y, Figaro 1 is, an elevation '0f my'gnndier, l lookiiat tho from, odge'thoreof wiiph a pori i of tho grinding fwheel and mountig "lbl'ken away! "Figure is la sectional View gshowing; rthe `turbine or water-wheelroonstrution, thoviow horno; taken online ofrFiguro i andiook ing'ln che direction of the nr'jro'wa My invention `rela/cesto a grinding Inaplifecl for domestic and Iother uses*` The lov# Figure 3 is a Vertical, side elevation of'thc :grinder apparatus 4illustraining the "details for the ycounter-"halance governor. A

Y Figure 4 is a top 'View of 4a fragmentary d portion ofthe apparatus showingV details of the vtool-holclor and arm. f Q The drawings illustrate' ja typical or" pre"n feifrcd manner of practicing my iiivertion, and are y'ino're or vless schematic for dheury fposef of disclosing the principles imohd. i ln these drawings I have A'einpijoyed "sirnilar 65 4reference characters to designate likeparts `iiherever 'they appear throughout the several Views. d The hpusingor casinguinWhichtheturhine Water-Wheel is e'nclosicoii'sists cfa Cylijijf 70 drical shell One Side :Wall 6 of which 'is preferably forined'iiitegraliy therewith, wha@ the opposa@ icio wou .7 is tho form Y. offja motor plato/of disk shaporlmit'is removaioiy Secured-tothe opon Sido'ofrifo'oaoing "oy means ofscrews8-l fAt a suitable upper' fdr;- tionof the casing thereis an inlet srtfu `,9 l`ia'vii`1` ,r a snia'll ihore `TO that dfniniinficate's oblique'ly'or tangentially with the interior f the casing and at its outer endfthefstul) ris .provided With a swiieledfjcoupling 11 fof the, Wellknown ty-p'e to permit I "theY apparatus being readily attached to or destachfcdfffrin tljfe:ser` vice tap or faucetthrough which water isgsup- :ringlike construction Aso that ift isn-necessxfl-ry to use a Solid YSt'oneas' is the ujsualr'act'ice, 100 l while the portion off the, spndi'e" within .che cas'nghas'a trbine 01 Watrwheel mounted thereon., This power,/emooioonsistsof 'a hub .that is secured v'to thergspii lle 13 b means olf "a kei? 1,8 which hub' fS` iQ i'deki 105 19 that are sot in obliquo disosiion ,with

the water is turned on, the blades are dl'iven by the pressure of the water against them and the water is discharged through the lower stub 12 into the sink or other receptacle. In this connection it should be noted that the lower edge of the outlet stub is in a plane slightly above the horizontal plane of thc lowest segment of the grind-stone, so that, as the water is emitted through the stub a limited amount thereof will splash against the stone because ot its close proximity thereto, thereby keeping the stone moist and avoid heating the same. It desired, in order to insure a. positive moistening the stone`r a lateral opening 12 may be made in the stub on the side thereof next to the stone which will discharge a small stream against the stone and maintain it moist so longl as the apparatus is in operation.

The annular Igrind stone 1G is mounted upon the periphery or outer surface ot a cylindrical Wheel or drum Q0 that has a central hub 2l secured to the extended end ot a spindle by means of a key or wedge 2Q and is maintained against lateral movement er displacement by a pin 23 that extends transversely through the end of the spindle. The drum Q0 is connected with the hub by the web or spokes 2 and there is a continuous lauge or abutment 40 that extends beyond the periphery ot the drum 20 alongside the edge ot the grind stone 16 to form a stop for the latter. The grindstone is maintained in position and against lateral displacement by means of an annular retainer ring 25 that is placed against the side of the stone opposite the llange 24C and is provided with a plurality oit lateral lugs or feet that are substantially L-shaped and are connected to the grind-stone mounting structure by means ot screws or the like.

A tool-rest is provided which consists et a suitably shaped arm 2T that extends across the -face ot the grind-stone in the manner shown in Figure l and intermediate its ends it rests against a cam-shaped iin Q8 on the casing wall adjacent the grind-stone. By moving the tool-rest up or down while in contact with the cam the rest may be adjusted toward or away from the operating surface of the grind stone. The tool rest terms a portion of an Lshape extensible bracket that is mounted upon the outer ball-bearing unit and consists oi a ring Q9 surrounding the ballbearing unit and held in position by the ballretainer cup and has an arm 30 projecting radially therefrom alongside the removable sidewall 7 and at its outer end is cooperatively connected to a lateral arm 31 extending from the tool rest proper. These arms overlap each other so that their combined length may be varied whenever desired by releasing the clamping member 32 and making the proper adjustment and then turning back said clamping member to hold the parts in their adjusted position. The clamping member 3Q passes through the overlapped arms and Lesaoez screws into any one of a plurality of tapped or threaded sockets 32 arranged in an arcuate formation in side-wall 7 of the housing.

lVhenever it is desired to employ the grinder in heavy service lsuch as grinding large tools, I have provided a co1mter-bal anced governor that may he` readitvv put into operation, and when in use it will perform the unction et' a ily-wheel. 'l`he end ol' the spindle lll is provided with a transverse groove lira in which there is mounted a pair otl movable arms 2523. The ends ot the arms that are adjacent each other are provided with eyes ill through which pivotal pins 35 are passed and the outer ends ol' the arms are provided with ball-shaped weights 35. It will be understood that when the spindle is rotated rapidly the balls, due to centrifugal torce will move the arms outwardly to their fullest extent in which position they will be diametrical opposite each other and will be disposed radially to the spindle and at right angles to the axis ot rotation thereof. This will assist in creating an increased momentum for the grind-stone so that large tools may be success-fully operated upon by the stone. Under ordinary conditions, when grinding knives or small tools the counterbalanced governor need not be used, and at such times the arms may be moved towards each other and secured in position by means ot the overlapping segments 37 that curve to vards each other from spaced locations on the arms 33 and when the latter have been placed in the desired position the segments may be secured together by the winged clamping element 558 in the manner shown in the drawings.

I have disclosed only a specilie manner of carrying out my invention, but it will be obvious to persons skilled in the art that changes or inodilications may be made without departing from the principles herein involved. The 'foregoing detailed description and drawings have been given tor clearness for understanding only and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible in view ol the prior art.

IVhat I claim is l. A grinding apparatus comprising a casing` a fluid inlet stub in the vupper portion of the casing, an outlet stub at the lower portion of the casing, a rotor actuated by {iuid passing through said easing, a spindle to which said rotor is secured. one end et said spindle being extended beyond the casing, and a grinding stone mounted on the extended end of said spindle. the peripheral portion of said stone being positioned adjacent the outlet stub and there being a lateral orifice in the wall et the outlet stub on its side next the stone whereby a portion of the fluid passing through said stub is discharged on said stone.

2. A grinding apparatus comprising a eas- IUS llt)

ing, fluid inlet and outlet stubs at upper and lower portions of the casing, a rotor Within the casing and actuated by fluid passing through the latter, a spindle on Which the rotor is` mounted and having its ends extended through said'easing, agrindino e1ement mounted on one extended end oi? said spindle, a pair of Weighted arms swingngly mounted on the other end of said spindle and adopted to be centrifugally moved into positions atfsubstantially right angles to the axis of the spindle, Where/byte provide a eounter-balanee during rotation of the spindle, and means for securing said arms against centrifugal movement.

3. A grinding apparatus comprising a cas ing, a spindle extended therethrough, a rotor mountedon the spindle Within the easing, means for passing Huid through said easing lto aetuate said rotor, a grinding element on an extended `end of said spindle, a tool-rest arm extended across said grinding element, a swinging extensible bracket on the casing to which said arm is connected, and acam member on the easing against Which the arm engages :for limiting the adjustment of the arm towards and away from the grinding element.

Signed at Chicago, in the county of Cook, and State of Illinois,`this 21st day of December, 1927. l

DEAR TUNGHoY. 

